Stone Studio

Assuming that the deterministic function y has additive Gaussian noise, evar(y) returns an estimated variance of this noise. A thin-plate smoothing spline model is used to smooth y. It is assumed that the model whose generalized cross-validation score is minimum can provide the variance of the additive noise. A few tests showed that evar works [...]

Damien Garcia has produced a 1-D to N-D robust smoothing matlab file to allow fast and robust smoothing of one-dimensional and multidimensional data w/wo missing values. A simple example for signal: y = cos(x/10)+(x/50).^2 + randn(size(x))/10; y([70 75 80]) = [5.5 5 6]; is shown below: In a continuous time domain, this might be like [...]

cloudPlot will help visualize the distribution of a 2-dimensional dataset. It is especially helpful when looking at extremely large datasets where a redular plot(x,y,’.’) will just fill the plot with a solid color because the measurement points overlap each other. cloudPlot uses the built-in matlab routines to set the axis limits and grid points appropriate [...]

I’m trying to keep this page as a little collection for Matlab in the application of Econometrics. Please let me know your favourite links, resources.

Modulation-spectrum Audio Coding In MATLAB Modulation spectrum is emerging as a novel sound representation which has found applications in both ASR as well as most recently in audio coding. During my visit at IDIAP, Prof. Hermansky introduced me to the topic referencing a paper by M. Vinton and L. Atlas on modulation spectrum audio coding [...]

Links (More links are coming): P. D. Kovesi.   MATLAB and Octave Functions for Computer Vision and Image Processing. School of Computer Science & Software Engineering, The University of Western Australia.   Available from: http://www.csse.uwa.edu.au/~pk/research/matlabfns/. Sylvain BOLTZ, PhD – Postdoctoral fellow in Computer Vision, École polytechnique, Laboratoire d’informatique (LIX) , 91128 Palaiseau Cedex, France. There are many code and nice [...]

RANSAC is an abbreviation for "RANdom SAmple Consensus". It is an iterative method to estimate parameters of a mathematical model from a set of observed data which contains outliers. It is a non-deterministic algorithm in the sense that it produces a reasonable result only with a certain probability, with this probability increasing as more iterations [...]

Microarray technology allows gene expression profiling at a global level by measuring mRNA abundance. ARMADA (Automated Robust MicroArray Data Analysis) is a MATLAB implemented program with a graphical user interface (GUI) which performs all steps of typical microarray data analysis; starting from importing raw data from several image analysis software outputs as well as text [...]

Matlab is a commercial program used extensively in the scientific and business communities.  There are many reasons why it is very popular, including its interactive structure, clean syntax, and ability to interface with fast compiled languages, like C.  It also has many routines for signal and image processing, optimization, and visualization.  Python is a modern [...]

I prefer not use MATLAB default folder (normally is: C:\Users\Dean\Documents\MATLAB) as the startup folder. I’ve all my MATLAB files stored in a folder called H:\svn\matlab\trunk, I basically wanted MATLAB starts and in this folder. This normally is very easy to do (at least with pre-2009 versions), however I received error message and found I need [...]